Consider a mass as shown in Fig. 5, extended by its own weight, per unit volume; its thickness is uniform with dimension t. We wish to compute the total extension at its bottom tip. b L hanging mass / unit volumn t Figure 5: A mass with weight per unit volume; we seek the total extension of this mass. The total length of the mass is L and its width is t. What is needed. Compute the total elongation of the mass, i.e. the downward deflection of its tip